Rest API 使用令牌和多部分形式调用后返回 401 错误

Question

I try to build a post request that contains form data content (file) and url. the Url is built this way: http://base-url/api/endpoint?name=modelTest This call works perfectly fine in postman but it seems i can't reproduce it in C# code.

My model object passed as param looks like this:

modelRequest.Model = @"C:\Users\temp\myFile.txt";

Here is the problematic method:

public async Task<ModelResponse> CreateModel(Uri url, ModelRequest modelRequest, string token)
{
    HttpClient httpClient = new HttpClient();
    using (var request = new HttpRequestMessage(new HttpMethod("POST"), url)) 
    { 
        request.Headers.TryAddWithoutValidation("Authorization", "Bearer " + token);
        var multipartContent = new MultipartFormDataContent(); 
        multipartContent.Add(new ByteArrayContent(
            File.ReadAllBytes(modelRequest.Model)), 
            "model", 
            Path.GetFileName(modelRequest.Model));
        request.Content = multipartContent;
        var response = await httpClient.SendAsync(request);
        string output = await response.Content.ReadAsStringAsync();
        Console.WriteLine(JsonConvert.DeserializeObject(output));
        ModelResponse returnValue = JsonConvert.DeserializeObject<ModelResponse>(output);
        return returnValue;     
    }

I have a 401 response. I even tried the generated code generated with Postman and I obtain the same issue.

The generated code by postman is the following:

var client = new RestClient("http://base-url/api/endpoint?name=modelTest");
client.Timeout = -1;
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer {token}");
request.AddFile("model", @"C:\Users\temp\myFile.txt");
IRestResponse response = client.Execute(request);
Console.WriteLine(response.Content);

Answer 1

Try this.

request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", token);

instead of this

request.Headers.TryAddWithoutValidation("Authorization", "Bearer " + token);